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Sensitivity of the second resonance mode of a near-field acoustic sensor to viscoelastic media:Investigation of bitumens

Published online by Cambridge University Press:  15 May 2000

J. Y. Ferrandis ,
H. Nounah  and
B. Cros
J. Y. Ferrandis*
Affiliation:
Laboratoire d'Analyse des Interfaces et de Nanophysique, (LAIN) (UPRESA 5011), Université Montpellier II, place E. Bataillon, 34095 Montpellier Cedex 5, France
H. Nounah
Affiliation:
Laboratoire d'Instrumentations et de Mesures, Faculté des Sciences, Université Ibnou Zohr, BP 28/S, Agadir, Morocco
B. Cros
Affiliation:
Laboratoire d'Analyse des Interfaces et de Nanophysique, (LAIN) (UPRESA 5011), Université Montpellier II, place E. Bataillon, 34095 Montpellier Cedex 5, France
*
ferrandi@lain.univ-montp2.fr
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Abstract

The alterations of the resonance frequency of the vibrating tip of an acoustic sensor detect the density and the viscosity of liquids. The employed acoustic near-field sensor has several resonance frequencies which correspond to its different parts. We determined that the resonance of the body of the acoustic sensor is sensitive to the rheological characteristics of viscoelastic media. We carried out experiments with bitumens and we modified the acoustic load on the sensor in two ways: the immersion depth of the tip and the temperature of the bitumen specimens. Theoretical and experimental results are compared.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 10 , Issue 2 , May 2000 , pp. 149 - 155
Copyright
© EDP Sciences, 2000

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